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Vacuum Pumps > Diffusion Pumps

Agilent (Varian) Diffusion Pumps

Because of its simplicity, high performance and low initial cost, the diffusion pump is the primary industrial high vacuum pumping mechanism. Agilent diffusion pumps offer high pumping speeds, high throughput, high tolerance forepressure, excellent backstreaming characteristics, low ultimate pressure, and long-term reliability. The full fractionating design allows vaporized fluid to be fractionated in the boiler and jet assembly. Contamination and decomposition products are pumped away and only the purest vapor reaches the top jet, assuring highest speed and lowest backstreaming. The foreline ejector stage provides high tolerance for pressure and a large surface area for efficient degassing of compressed fluid, while the foreline baffle minimizes fluid loss, even under high throughput conditions.

HS2 Model : High speed, low ultimate pressure, high throughput, high tolerable forepressure, and low backstreaming combine with low cost to make HS2 an excellent choice for your diffusion pump needs. Equipped with full thermal protection and quick cool coils.

VHS Series : Fast and clean diffusion pumps for their size, these pumps have a sight glass/fill and drain assemblies for continuous monitoring and easy maintenance of pump fluid.

Remanufactured Vacuum Pumps
Remanufactured Pumps

View a list of remanufactured vacuum pumps available from The Kurt J. Lesker Company's Remanufactured Vacuum Pump Division.
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Vacuum Pump Repair & Services
Pump Repair & Services

Our factory-trained vacuum pump service technicians are equipped to handle the maintenance and repair of virtually any brand and type of vacuum pump.
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Specifications Table

Pump Model
VHS4
VHS6
VHS10
HS2
VHS400
Pumping Speed
L/sec (cfm)
N2: 750
He:940
H2: 940
N2: 1,550
He: 1,930
H2: 1,930
N2: 3,650
He: 4,560
H2: 4,560
N2: 160
He: 200
H2: 200
N2: 4,500
He: 5,625
H2: 5,625
Inlet Flange
4" ASA / ISO 160K
6" ASA / ISO 200K
10" ASA / ISO 320K
2" ASA
ISO 400K
Foreline Flange
QF40
1.5" ASA / ISO 50KF
2"ASA / ISO 63K
0.84" Diam Tube
ISO 63K
Operating Range Torr
(mbar)
2 x 10-3 to <5 x 10-9
(2.7 x 10-3 to <6.5 x 10-9)
1.5 x 10-3 to <5 x 10-9
(2 x 10-3 to <6.5 x 10-9)
1.7 x 10-3 to <5 x 10-9
(2.3 x 10-3 to <6.5 x 10-9)
3.7 x 10-3 to <5 x 10-8
(4.9 x 10-3 to <6.5 x 10-8)
1.4 x 10-3 to <5 x 10-9
(1.9 x 10-3 to <6.5 x 10-9)
Max. Foreline Press.Torr
(mbar)
No load: 0.65 (0.86)
Full load:0.55 (0.73)
No load: 0.65 (0.86)
Full load:0.55 (0.73)
No load: 0.65 (0.86)
Full load:0.55 (0.73)
No load: 0.55 (0.72)
Full load:0.40 (0.52)
No load: 0.65 (0.86)
Full load:0.55 (0.73)
Backing Pump Min.Speed
CFM (m3/hr)
10 (17)
17 (28.9)
30 (51)
5 (8.5)
30 (51)
Water Fittings
1/8" FPT
1/8" FPT
1/8" FPT
1/8" FPT
1/8" FPT
Cooling Water
L/hr (gal/hr)
30 (0.15)
50 (0.25)
80 (0.40)
20 (0.1)
80 (0.40)
Warm-up Time
(min.)
10
10
15
15
15
Cool-down Time
(min.)
10
10
25
10
25
Fluid Charge
300 cc
500 cc
1000 cc
100 cc
1000 cc
Weight lbs (kg)
55 (25)
75 (34)
150 (68)
20 (9)
150 (68)

Charts

Dimensional Drawings

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Ordering Table

Pump
Model
Inlet
Flange
Voltage &
Phases
Oil
Prep
Manual PartNo Price Add To Cart
Pump
Model
Inlet
Flange
Voltage &
Phases
Oil
Prep
Manual PartNo Price Add To Cart
Agilent HS2
2" ASA
120 VAC 50/60 Hz, 1-Ø
Fomblin
--
DPD0285SAA
$4,097.00
Agilent VHS10
ISO320-K
208/240/380/480 VAC 50/60 Hz, 3-Ø
Download PDF
DPD5300
P.O.R.
Agilent VHS4
4" ASA
208 VAC 50/60 Hz, 1-Ø
Download PDF
DPD1200SBA
P.O.R.
Agilent VHS4
ISO160-K
208 VAC 50/60 Hz, 1-Ø
Download PDF
DPD1200SBI
P.O.R.
Agilent VHS4
DN160CF (8.00" OD)
208 VAC 50/60 Hz, 1-Ø
Download PDF
DPD1200SBU
$6,107.00
Agilent VHS400
ISO400-K
208/240/380/480 VAC 50/60 Hz, 3-Ø
--
DPD8000
P.O.R.
Agilent VHS6
6" ASA
208 VAC 50/60 Hz, 1-Ø
--
DPD2400SBA
P.O.R.
Agilent VHS6
ISO200-K
208 VAC 50/60 Hz, 1-Ø
--
DPD2400SBI
P.O.R.
Agilent VHS6
DN200CF (10.00" OD)
208 VAC 50/60 Hz, 1-Ø
--
DPD2400SBU
P.O.R.

Can't Find The Pump You're Looking For? Let our new Pump Selection Guide help! With over 450 vacuum pumps to choose from, the KJLC® Vacuum Pump Selection Guide is designed to help you find one that meets your vacuum requirements. You can narrow down our pump offering by simply choosing from a list of different search criteria. For more information please e-mail international@lesker.com.

Accessories Table

For Pump Model(s) Description PartNo Price Add
To Cart
For Pump Model(s) Description PartNo Price Add
To Cart
All Agilent Diffusion Pumps
704 Silicone Oil (1 gallon)
704CA
P.O.R.
All Agilent Diffusion Pumps
704 Silicone Oil (500 cc)
704BB
$84.00
All Agilent Diffusion Pumps
705 Silicone Oil (1 gallon)
705CA
$805.00
All Agilent Diffusion Pumps
705 Silicone Oil (500 cc)
705BB
$150.00
M4
Heater (1,190 W; 120 VAC)
H1212-4/9D
$196.00
M4
Heater (1,190 W; 240 VAC)
H1224-4/9D
P.O.R.
VHS4
Heater (1,450 W; 120 VAC)
H1512-4/9D
$196.00
VHS4
Heater (1,450 W; 240 VAC)
H1524-4/9D
P.O.R.
VHS6
Heater (2.2 kW; 120 VAC)
H2212-6D
P.O.R.
VHS6
Heater (2.2 kW; 240 VAC)
H2224-6D
$225.00
HS2
Heater (450 W; 120 VAC)
HW5C033-0118
P.O.R.
HS2
Heater (450 W; 240 VAC)
HW5C033-0116
P.O.R.
VHS10
Heater (5.0 kW; 240 VAC)
H5024-12D
P.O.R.

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